3 Replies Latest reply on Sep 21, 2018 6:57 AM by Janko Stellaard

    Ambient temperature in flow simulation

    Jaime Kolln

      I am modeling a transformer in a subterranean vault. I have done this before with no issues but recently had to create a different size of vault. Previously I was able to set up a fluid subdomain to simulate the air temperature with a dependency.  With the new assembly I am getting an error stating "cannot find the faces associated with this item". Does anyone have any suggestions?

        • Re: Ambient temperature in flow simulation
          Janko Stellaard

          I think that some of the faces you have selected in your boundary conditions are not inside of the computational domain.

            • Re: Ambient temperature in flow simulation
              Jaime Kolln

              I have double checked and all parts of the assembly are within the computational domain. I also have no hidden bodies as was suggested in another post.

                • Re: Ambient temperature in flow simulation
                  Janko Stellaard

                  A. Symptom

                  When validating the definition of a Boundary Condition, the message 'Face [...] is not laying on the boundary between the solid and fluid region' pops up.

                  Or when validating the definition of a Fluid Subdomain, the message 'Cannot find the faces associated with this item' pops up.

                  In both cases, the definition cannot be completed.

                   

                  B. Cause

                  There are three main reasons for this error message occurring:

                  1. Simple Reason – The SOLIDWORKS® geometry has been prepared correctly for an internal flow analysis, but you do not selecting a face that is in contact with the flow domain. For example, selecting the outside face of a lid instead of the inner face to apply a boundary condition.

                  2. Common Reason 1 – Invalid contacts exist between parts in an assembly (there may be an edge-edge or point-face mates between two SOLIDWORKS features)

                  3. Common Reason 2 – The SOLIDWORKS model is not "analysis ready" yet because openings in the geometry prevent the program from detecting an internal volume (fluid domain) that touches the face you selected.

                   

                  C. Solution

                  Check which of the above explanations corresponds to your case, starting from the top of the list.

                  To check for Invalid contacts, refer to the procedure in Solution ID: S-019593.

                  To detect small openings in your model, refer to the procedure in Solution ID: S-026938